I'm not an expert on cars, but I once had an intermittently clogged fuel filter that caused the car to stall sometimes. Changing the filter was the fix in my situation. Hope you get the problem id'd and fixed. Good luck! AL
4 minute video of our build - A 5x8 Camper for a family of 5 - http://youtu.be/CYGTlkfpIhY How we built a 5x8 camper for a family of 5, using a utility trailer with an incorporated bunk bed for the kids. From plain trailer to campground! Also - More pictures here: http://flic.kr/ps/225piC